sciencehabit writes: Something is orbiting the bright star Fomalhaut in the constellation known as the Southern Fish, but no one knows exactly what it is. New observations carried out last year with the Hubble Space Telescope confirm that the mysterious object, known as Fomalhaut b, is traveling on a highly elongated path, but they haven't convincingly nailed down its true nature. But if it is a planet, as one team of astronomers thinks, we may be in for some celestial fireworks in 2032, when Fomalhaut b starts to plough through a broad belt of debris that surrounds the star and icy comets within the belt smash into the planet's atmosphere.
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